# A package for the ab-initio calculation of one- and two-photon cross sections of two-electron atoms, using a CI B-splines method

## Description

Abstract A package is presented for the fully ab-initio calculation of one- and two-photon ionization cross sections for two-electron atomic systems (H^- , He, Mg, Ca,...) under strong laser fields, within lowest-order perturbation theory (LOPT) and in the dipole approximation. The atomic structure is obtained through configuration interaction (CI) of antisymmetrized two-electron states expanded in a B-spline finite basis. The formulation of the theory and the relevant codes presented here represent t... Title of program: BSPCI2E Catalogue Id: ADQV_v1_0 Nature of problem Ab-initio calculation of one- and two-photon ionization cross sections for two-electron atoms under strong laser fields, within lowest-order perturbation theory and in dipole approximation. Versions of this program held in the CPC repository in Mendeley Data ADQV_v1_0; BSPCI2E; 10.1016/S0010-4655(02)00684-7 This program has been imported from the CPC Program Library held at Queen's University Belfast (1969-2019)